feat: Add Regex cleaned string

* A string that won't influence regex matching

Signed-off-by: AlexNg <contact@ngjx.org>

cmd/utils/string.go

@@ -1,6 +1,9 @@
 package utils
 
-import "strings"
+import (
+	"strings"
+	"unicode"
+)
 
 // StringStartsWith returns true if the given string
 // starts with the given string look, or if they start similarily.
@@ -24,6 +27,21 @@ func EscapeTermString(s string) string {
 	return CleanString(s, '|', '&', ';', '`', '$')
 }
 
+// Invokes CleanString to prevent regex
+func CleanStringNoRegex(s string) string {
+	var builder strings.Builder
+	builder.Grow(len(s)) // Optimize for the expected size to reduce reallocations.
+
+	for _, r := range s {
+		// Filter out any non-alphanumeric and non-space characters.
+		if unicode.IsLetter(r) || unicode.IsDigit(r) || unicode.IsSpace(r) {
+			builder.WriteRune(r)
+		}
+	}
+
+	return builder.String()
+}
+
 // Escapes the given string from common escape sequences
 // in 0(n) time, no regex.
 //

cmd/utils/string_test.go

@@ -98,6 +98,64 @@ func TestCleaningString(t *testing.T) {
 	}
 }
 
+func TestCleanStringNoRegex(t *testing.T) {
+	tests := []struct {
+		name     string
+		input    string
+		expected string
+	}{
+		{
+			name:     "Alphanumeric string",
+			input:    "Hello123",
+			expected: "Hello123",
+		},
+		{
+			name:     "String with spaces",
+			input:    "Hello World 123",
+			expected: "Hello World 123",
+		},
+		{
+			name:     "String with special characters",
+			input:    "Hello@World!123#",
+			expected: "HelloWorld123",
+		},
+		{
+			name:     "String with unicode characters",
+			input:    "こんにちは世界123",
+			expected: "こんにちは世界123",
+		},
+		{
+			name:     "String with mixed valid and invalid characters",
+			input:    "Hello, World! #123",
+			expected: "Hello World 123",
+		},
+		{
+			name:     "Empty string",
+			input:    "",
+			expected: "",
+		},
+		{
+			name:     "String with only special characters",
+			input:    "@#$%^&*()",
+			expected: "",
+		},
+		{
+			name:     "String with leading and trailing spaces",
+			input:    "  Hello World  ",
+			expected: "  Hello World  ",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := utils.CleanStringNoRegex(tt.input)
+			if result != tt.expected {
+				t.Errorf("CleanStringNoRegex(%q) = %q; expected %q", tt.input, result, tt.expected)
+			}
+		})
+	}
+}
+
 func BenchmarkStringStartsWith(b *testing.B) {
 	cases := []struct {
 		prefix string